Docker installation and proxy settings from docker site (Cent OS)

I - Installation :-

1)Adding docker yum repository to your local machine.

#vi  /etc/yum.repos.d/docker.repo

[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
#Proxy config -- optional
#proxy=http://192.168.1.1:80
#proxy_username=domainname\username
#proxy_password=password

2)Install docker throught yum

#yum install docker-engine

3)start & check status of docker service using systemctl

#systemctl start docker.service
#systemctl status  docker.service

II - Docker Proxy configuration for  docker image :- 

1)create a directory for docker service

#mkdir /etc/systemd/system/docker.service.d

2)Add proxy settings in config file

#vi /etc/systemd/system/docker.service.d/http-proxy.conf

[Service]
Environment="http_proxy=http://domainname\username:password@192.168.1.1:80"

3)Reload docker config and restart docker service

  # systemctl daemon-reload
  # systemctl show docker --property Environment
  # systemctl restart docker

4)Check docker service and pull ubuntu image

  #docker run hello-world
  #docker run -it ubuntu bash

5)check docker version
 
  #docker info